Condensed Consolidated Statements of Equity - USD ($) $ in Millions	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Other Comprehensive Loss	Retained Earnings	Non-Controlling Interests	Total
Balance at Dec. 31, 2018	$ 1	$ 1,096	$ (1,091)	$ (1,154)	$ 3,536	$ 20
Increase (Decrease) in Stockholders' Equity
Net income					100	2	$ 102
Dividends declared					(42)
Repurchases of common stock, net		32	31
Share-based compensation, net of issuance		9	10
Other comprehensive income (loss)				(6)
Balance at Mar. 31, 2019	1	1,137	(1,050)	(1,160)	3,594	22
Balance at Dec. 31, 2019	1	1,137	(1,040)	(1,158)	3,780	21	2,741
Increase (Decrease) in Stockholders' Equity
Net income					75	3	78
Dividends declared					(42)
Share-based compensation, net of issuance		5	12
Other comprehensive income (loss)				(164)		(3)
Balance at Mar. 31, 2020	$ 1	$ 1,142	$ (1,028)	$ (1,322)	$ 3,813	$ 21	$ 2,627